setup: warning non-cached tool: github/action-runners ships only one …

…tool version

Removed message about policy that several versions of GHC and cabal
are shipped---not true any longer.

Updated links to point to current upstream action-runners repo.

setup/src/installer.ts

@@ -49,25 +49,18 @@ async function success(
 }
 
 function warn(tool: Tool, version: string): void {
-  const policy = {
-    cabal: `the two latest major releases of ${tool} are commonly supported.`,
-    ghc: `the three latest major releases of ${tool} are commonly supported.`,
-    stack: `the latest release of ${tool} is commonly supported.`
-  }[tool];
-
   core.debug(
     `${tool} ${version} was not found in the cache. It will be downloaded.\n` +
       `If this is unexpected, please check if version ${version} is pre-installed.\n` +
-      `The list of pre-installed versions is available here: https://help.github.com/en/actions/reference/software-installed-on-github-hosted-runners\n` +
-      `The above list follows a common haskell convention that ${policy}\n` +
-      'If the list is outdated, please file an issue here: https://github.com/actions/virtual-environments\n' +
-      'by using the appropriate tool request template: https://github.com/actions/virtual-environments/issues/new/choose'
+      `The list of pre-installed versions is available from here: https://github.com/actions/runner-images#available-images\n` +
+      'If the list is outdated, please file an issue here: https://github.com/actions/runner-images/issues\n' +
+      'by using the appropriate tool request template: https://github.com/actions/runner-images/issues/new/choose'
   );
 }
 
 function aptVersion(tool: string, version: string): string {
-  // For Cabal, extract the first two segments of the version number. This
-  // regex is intentionally liberal to accomodate unusual cases like "head".
+  // For Cabal, extract the first two segments of the version number.
+  // This regex is intentionally liberal to accommodate unusual cases like "head".
   return tool === 'cabal' ? /[^.]*\.?[^.]*/.exec(version)![0] : version;
 }